Saint Arialdo is a Christian saint of the eleventh century. He was assassinated because of his efforts to reform the Milanese clergy.
Arialdo da Carimate. Altar in the "Basilica di San Calimero" in Milan
Arialdo's martyrdom (Basilica di San Calimero, Milan).
Peter Damian was an Italian reforming Benedictine monk and cardinal in the circle of Pope Leo IX. Dante placed him in one of the highest circles of Paradiso as a great predecessor of Francis of Assisi
Arialdo
…Velate. Pope Stephen IX removed the excommunication and Arialdo returned to Milan to continue his efforts towards reformation. In 1069 the Pope sent Peter Damiani as legate to attempt a resolution. The issue then became less a matter of clerical conduct than the authority of Rome over Milan. Damiani was able to…
Bust of Peter Damian. Santa Maria degli Angeli, Florence.
Peter Damian (far right), depicted with Augustine, Anne, and Elizabeth
Sancti Petri Damiani Opera Omnia (1743)
Vita Beati Romualdi (modern print edition)